Active fire extinguishing fabric

Abstract

The application discloses an active fire extinguishing fabric, which comprises organic hollow fibers filled with fire extinguishing agents, fiber yarns and a fireproof coating. The organic hollow fibers filled with fire extinguishing agents and the fiber yarns are combined by weaving to form a fabric, and the prepared fabric is combined with the fireproof coating to obtain the active fire extinguishing fabric. When the active fire extinguishing fabric extinguishes fire, the fireproof coating is located on a side far from the fire, and the fabric layer is located on a side close to the fire. When the organic hollow fiber tube wall is damaged by the fire, the low-boiling-point fire extinguishing agent inside is sprayed out. Since the fireproof coating blocks the way, the gasified fire extinguishing agent can only spread downward to the vicinity of the ignition point to extinguish the flame, so that the purpose of rapid fire extinguishing is achieved.

Description

Technical Field

[0001] This invention relates to the field of fire extinguishing materials, and in particular to an active fire extinguishing fabric. Background Technology

[0002] There are two main types of fire blankets on the market. One type is a fabric woven from flame-retardant organic or inorganic fiber yarns. Its main fire extinguishing mechanism is to cover the fire point and isolate it from oxygen. This method cannot guarantee the timeliness and safety of fire extinguishing. The other type is a fire blanket containing microcapsules. The microcapsules are filled with fire extinguishing agents that can rupture and release them at high temperatures to achieve active fire extinguishing. However, the amount of fire extinguishing agent contained in the microcapsules is relatively small, and the bonding strength and durability between the microcapsules and the fabric can be affected by factors such as storage, transportation, and folding, thus reducing the fire extinguishing efficiency. Summary of the Invention

[0003] To solve the above technical problems, the present invention provides an active fire extinguishing fabric.

[0004] The present invention is achieved by the following technical solution.

[0005] An active fire extinguishing fabric includes organic hollow fibers filled with fire extinguishing agent, fiber yarns, and a fire-retardant coating. The organic hollow fibers filled with fire extinguishing agent and the fiber yarns are combined by a weaving method to form a fabric. The prepared fabric is then combined with the fire-retardant coating to obtain the active fire extinguishing fabric.

[0006] Furthermore, the organic hollow fiber is selected from either polyolefin or silicone.

[0007] Furthermore, the polyolefin is selected from polyethylene or polypropylene.

[0008] Furthermore, the cavity shapes of organic hollow fibers include circular, triangular, and star-shaped.

[0009] Furthermore, the extinguishing agent is selected from one or more of perfluorohexanone, 2-bromo-3,3,3-trifluoropropene (2-btp), pentafluoroethane, and heptafluoropropane.

[0010] Furthermore, the fiber yarn is selected from organic fiber yarn and / or inorganic fiber yarn; the organic fiber yarn is selected from one or more of aramid fiber yarn, acrylic fiber yarn, polyimide fiber yarn, flame-retardant cotton fiber, and pre-oxidized filament fiber yarn.

[0011] Furthermore, the inorganic fiber yarn is selected from one or more of the following: carbon fiber yarn, glass fiber yarn, ceramic fiber yarn, basalt fiber yarn, silicon carbide fiber yarn, and alumina fiber yarn.

[0012] Furthermore, after the fire extinguishing agent is filled into the organic hollow fiber, it is sealed by using one of the following: AB glue, hot melt glue, or UV curing glue.

[0013] Furthermore, the weaving is selected from one of the following: shuttle weaving, shuttleless weaving, multiphase weaving, three-dimensional weaving, and special weaving.

[0014] Furthermore, the fire-retardant coating can be made of silicone or aluminum foil.

[0015] This application has the following beneficial effects.

[0016] (1) The present invention has a simple structure, is easy to use and store: the fabric made by weaving is thinner, the extinguishing agent is contained in the middle of the fabric layer, and folding the fabric does not affect the content and life of the extinguishing agent in the fabric;

[0017] (2) The invention has high safety: After the flames in the fire destroy the hollow fiber wall, the fire extinguishing agent inside will quickly extinguish the fire, which can protect the safety of firefighters and reduce property loss;

[0018] (3) The present invention has a higher content of fire extinguishing agent: Compared with nanospheres, the fire extinguishing agent is directly filled into hollow fibers, and the content of fire extinguishing agent is higher than that of nanospheres, which improves the fire extinguishing ability;

[0019] (4) The fire extinguishing agent of the present invention has high efficiency: when the hollow fiber tube is destroyed by the flame at the ignition point, the low boiling point fire extinguishing agent in the hollow fiber tube will be sprayed out from the destruction point under pressure and directly released near the ignition point. This is equivalent to most of the fire extinguishing agent in the fabric being directly applied to the fire site, thereby achieving the purpose of rapid fire extinguishing and reducing property loss. Attached Figure Description

[0020] Figure 1 This is a cross-sectional schematic diagram of the organic hollow fiber of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of the organic hollow fiber of the present invention;

[0022] Figure 3 This is a schematic diagram of the structure of the organic hollow fiber of the present invention, which is filled with fire extinguishing agent in the middle and sealed at both ends;

[0023] Figure 4 This is a schematic diagram of a fabric woven from organic hollow fiber and inorganic fiber yarns filled with fire extinguishing agent according to the present invention.

[0024] Figure 5 This is a schematic diagram of the overall structure of the fire extinguishing fabric of the present invention (the top layer is a fireproof coating, and the bottom layer is warp and weft yarns, wherein the organic hollow fibers filled with fire extinguishing agent serve as part of the weft yarns).

[0025] Among them, 1-organic hollow fiber shell, 2-fire extinguishing agent, 3-sealing, 11-organic hollow fiber filled with fire extinguishing agent, 12-inorganic fiber yarn, 13-organic fiber yarn, 14-fireproof coating. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0027] The active fire extinguishing fabric of the present invention comprises organic hollow fibers 11 filled with fire extinguishing agent, organic fiber yarns 13 or inorganic fiber yarns 12, and a fire-retardant coating 14 made of silicone / aluminum foil. The organic hollow fibers 11 filled with fire extinguishing agent are continuous long fibers, which are combined with the organic / inorganic fiber yarns by weaving after end sealing to form a fabric. During the weaving process, the organic hollow fibers can be used as warp or weft. The prepared fabric is then combined with the fire-retardant coating 14 made of silicone / aluminum foil to form the finished active fire extinguishing fabric. When the active fire extinguishing fabric extinguishes a fire, the silicone / aluminum foil coating is on the side away from the fire, and the fabric layer is on the side in contact with the fire. When the flame breaks through the wall of the organic hollow fiber tubes, the low-boiling-point fire extinguishing agent inside is ejected. The fire extinguishing agent rapidly evaporates, absorbs heat to generate steam, and lowers the temperature near the combustion point. Due to the obstruction of the silicone / aluminum foil coating, the vaporized fire extinguishing agent can only diffuse downwards to the vicinity of the ignition point to extinguish the flame, thereby achieving the purpose of rapid fire extinguishing.

[0028] Example 1

[0029] A schematic diagram of the structure of an active fire extinguishing fabric is shown below. Figure 5 As shown, it is composed of organic hollow fibers 11 filled with fire extinguishing agent, organic fiber yarns 13, inorganic fiber yarns 12 and fire-retardant coating 14.

[0030] Fire-retardant coating 14 is a fire-retardant silicone coating.

[0031] Organic hollow fiber shell 1 is made of polypropylene, and the cavity shape is circular (Zhejiang Xinhui Membrane Technology Co., Ltd., outer diameter 2mm, inner diameter 1mm, such as...). Figure 2 The extinguishing agent 2 is perfluorohexanone. A small fluid pump is used to fill the perfluorohexanone into the polypropylene hollow fiber. The sealing agent 3 at both ends of the hollow fiber is hot melt adhesive to encapsulate the hollow fiber. Figure 3 ).

[0032] Organic fiber yarn 13 is made of 300TEX polyimide fiber yarn, and inorganic fiber yarn 12 is made of 800TEX carbon fiber yarn.

[0033] Organic hollow fibers and fiber yarns are woven using a shuttle loom. Figure 4Inorganic fiber yarn 12 serves as part of the warp and part of the weft, organic hollow fiber serves as part of the warp, and organic fiber yarn 13 serves as part of the weft. The ratio of warp to weft is 1.5:1. The ratio of organic hollow fiber, organic fiber yarn 13, and inorganic fiber yarn 12 in the yarns and fibers used in the fabric is 15:20:65, and the fabric density is 32*25 / inch. After manufacturing, the fabric is bonded to a fire-retardant silicone layer, forming a heat-resistant, dense fire-retardant coating 14 on one side of the fabric.

[0034] In the firefighting application of the above-mentioned active fire extinguishing fabric, although each organic hollow fiber 11 filled with extinguishing agent is independent, when the fabric is exposed to open flame or at high temperature (above 200 degrees Celsius), the extinguishing agent 2 inside will be rapidly sprayed out within 10 seconds due to the thermal expansion of the extinguishing agent 2 or the high temperature burning and destruction of the hollow fiber wall. Moreover, the extinguishing agent 2 in the entire hollow fiber will be sprayed out under high temperature conditions, and the extinguishing agent 2 will be directly applied to the ignition point after being sprayed out. Because extinguishing agent 2 evaporates and absorbs a large amount of heat and quickly turns into gas, online temperature monitoring of the extinguishing zone using thermocouples revealed that the temperature near the ignition point could be reduced by about 150 degrees Celsius within 5 seconds after extinguishing agent 2 was completely sprayed. Rapid sampling and analysis of the gas composition near the ignition point using a portable gas measuring instrument showed that the oxygen content near the ignition point decreased by 35% 5 seconds after extinguishing agent 2 was completely sprayed, achieving the goal of rapid fire extinguishing. Furthermore, thanks to the dense fire-retardant coating 14, the vast majority of the extinguishing agent gas did not overflow, ensuring that the concentration of the extinguishing agent near the fire source remained within a relatively high range, thus guaranteeing fire extinguishing efficiency.

[0035] Example 2

[0036] An active fire extinguishing fabric, the structural diagram of which is shown below. Figure 5 As shown, it is composed of organic hollow fibers 11 filled with fire extinguishing agent, organic fiber yarns 13, inorganic fiber yarns 12 and fire-retardant coating 14.

[0037] Fire-retardant coating 14 is made of aluminum foil.

[0038] The hollow fiber shell 1 is made of silicone, with a circular cavity shape (Dongguan Tiansheng Silicone Products Co., Ltd., outer diameter 1.5mm, inner diameter 1mm). The fire extinguishing agent 2 is 2-bromo-3,3,3-trifluoropropylene (2-BTP). A small fluid pump is used to fill the silicone hollow fiber with 2-BTP. The sealant 3 at both ends of the hollow fiber is made of AB glue to encapsulate the hollow fiber. Figure 3 ).

[0039] Organic fiber yarn 13 is made of 200TEX pre-oxidized fiber yarn, and inorganic fiber yarn 12 is made of 600TEX alumina fiber yarn.

[0040] Organic hollow fibers and fiber yarns are woven using a shuttle loom. Figure 4 Inorganic fiber yarn 12 serves as part of the warp and part of the weft, organic hollow fiber serves as part of the warp, and organic fiber yarn 13 serves as part of the weft. The ratio of warp to weft is 1.2:1. In the fabric, the ratio of organic hollow fiber, organic fiber yarn 13, and inorganic fiber yarn 12 is 20:10:70, and the fabric density is 36*25 / inch. After manufacturing, the fabric is then bonded to an aluminum foil layer to form a heat-resistant fire-retardant coating 14 on one side of the fabric.

[0041] In firefighting applications, each organic hollow fiber 11 filled with extinguishing agent, although independent, will rapidly release the extinguishing agent 2 within 10 seconds when exposed to open flames or at high temperatures (above 250 degrees Celsius). This is due to the thermal expansion of the extinguishing agent 2 or the burning and destruction of the hollow fiber walls. Furthermore, the extinguishing agent 2 within the entire hollow fiber will be released under high-temperature conditions. Once released, the extinguishing agent 2 will be directly applied to the ignition point. As the extinguishing agent 2 evaporates and absorbs a large amount of heat, rapidly turning into a gas, it is then extinguished by a thermocouple. Online temperature monitoring of the fire extinguishing zone revealed that the temperature could be reduced by approximately 150 degrees Celsius within 5 seconds of the complete release of extinguishing agent 2. Rapid sampling and analysis of the gas composition near the ignition point using a portable gas analyzer showed that the oxygen content near the ignition point decreased by 33% 5 seconds after the complete release of extinguishing agent 2, achieving rapid fire extinguishing. Furthermore, thanks to the dense fire-retardant coating 14, the vast majority of the extinguishing agent gas did not overflow, ensuring a relatively high concentration of extinguishing agent near the fire source and thus guaranteeing fire extinguishing efficiency.

[0042] Example 3

[0043] An active fire extinguishing fabric, the structural diagram of which is shown below. Figure 5 As shown, it is composed of organic hollow fibers 11 filled with fire extinguishing agent, organic fiber yarns 13, inorganic fiber yarns 12 and fire-retardant coating 14.

[0044] Fire-retardant coating 14 is made of aluminum foil.

[0045] The organic hollow fiber shell 1 is made of silicone, and the cavity shape is circular (Dongguan Tiansheng Silicone Products Co., Ltd., outer diameter 1.8mm, inner diameter 1mm). The fire extinguishing agent 2 is perfluorohexanone. A small fluid pump is used to fill the silicone hollow fiber with perfluorohexanone. The sealant 3 at both ends of the hollow fiber is made of UV-curable adhesive to encapsulate the hollow fiber. Figure 3 ).

[0046] The organic fiber yarn 13 is made of 300TEX aramid fiber yarn, and the inorganic fiber yarn 12 is made of 500TEX silicon carbide fiber yarn.

[0047] Organic hollow fibers and fiber yarns are woven using a shuttle loom. Figure 4 Inorganic fiber yarn 12 serves as part of the warp and part of the weft, organic hollow fiber serves as part of the warp, and organic fiber yarn 13 serves as part of the weft. The ratio of warp to weft is 1.6:1. In the fabric, the ratio of organic hollow fiber, organic fiber yarn 13, and inorganic fiber yarn 12 is 25:20:55, and the fabric density is 40*35 / inch. After manufacturing, the fabric is then bonded to an aluminum foil layer to form a heat-resistant fire-retardant coating 14 on one side of the fabric.

[0048] In firefighting applications, each organic hollow fiber 11 filled with extinguishing agent is independent. However, when the fabric encounters an open flame or is in a high-temperature state (above 250 degrees Celsius), the extinguishing agent 2 will be rapidly ejected within 10 seconds due to the thermal expansion of the extinguishing agent 2 or the high-temperature burning and destruction of the hollow fiber wall. Furthermore, the extinguishing agent 2 in the entire hollow fiber will be ejected under high-temperature conditions. After being ejected, the extinguishing agent 2 will be directly applied to the ignition point. As the extinguishing agent 2 evaporates and absorbs a large amount of heat and quickly turns into gas, the temperature and oxygen content at the ignition point are measured by thermocouples and portable gas measuring instruments. It was found that within 5 seconds after the extinguishing agent is completely ejected, the temperature near the ignition point can be reduced by about 180 degrees Celsius and the oxygen content can be reduced by 27%, achieving the purpose of rapid fire extinguishing and thus ensuring fire extinguishing efficiency.

[0049] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. An active fire extinguishing fabric, characterized in that: The application relates to a fire extinguishing fabric, which comprises filled organic hollow fibers, fiber yarns and a fireproof coating, wherein the filled organic hollow fibers and the fiber yarns are combined into a fabric through weaving, and the prepared fabric is combined with the fireproof coating to form the fireproof coating on one side of the fabric, thereby obtaining the active fire extinguishing fabric. The organic hollow fibers are selected from polyolefins or silica gel. The fiber yarns are selected from organic fiber yarns and / or inorganic fiber yarns; the organic fiber yarns are selected from one or more of aramid fiber yarns, acrylic fiber yarns, polyimide fiber yarns, flame-retardant cotton fibers and pre-oxidized fiber yarns. The inorganic fiber yarns are selected from one or more of carbon fiber yarns, glass fiber yarns, ceramic fiber yarns, basalt fiber yarns, silicon carbide fiber yarns and alumina fiber yarns. The fire extinguishing agent is selected from one or more of perfluorohexanone, 2-bromo-3,3,3-trifluoropropene, pentafluoroethane and heptafluoropropane.

2. A proactive fire extinguishing fabric according to claim 1, characterized in that: The polyolefins are selected from polyethylene or polypropylene.

3. The active fire extinguishing fabric of claim 1, wherein: The cavity shape of the organic hollow fibers includes a circle, a triangle and a star.

4. The active fire extinguishing fabric of claim 1, wherein: After the fire extinguishing agent is filled into the organic hollow fibers, the organic hollow fibers are sealed by using one of AB glue, hot melt glue and ultraviolet curing glue.

5. The active fire extinguishing fabric of claim 1, wherein: The weaving is selected from one of shuttle weaving and shuttleless weaving.

6. The active fire extinguishing fabric of claim 1, wherein: The fireproof coating is selected from silica gel or aluminum foil coating.

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